const
  HOOK_DLL='hookdll.dll';

  HOOK_MSG_KEYBOARD = WM_APPCOMMAND + 100;
  HOOK_MSG_CBT_SYSCOMMAND = WM_APPCOMMAND + 101;
  HOOK_MSG_CBT_ACTIVATE = WM_APPCOMMAND + 102;
  ATALHO_PRESSIONADO_MSG = WM_APPCOMMAND + 103;

  HOOK_INSTALLED_FAILED=0;
  HOOK_INSTALLED_OK=1;
  HOOK_ALREADY_INSTALLED=2;

  HOOK_UNINSTALLED_FAILED=0;
  HOOK_UNINSTALLED_OK=1;
  HOOK_NOT_INSTALLED=2;
